CAN-USB/2 USB 2.0-CAN-Interface Hardware Manual to Product C.2066.xx CAN-USB/2 Hardware Manual • Doc. No.: C.2066.21 / Rev. 1.4 esd electronic system design gmbh Vahrenwalder Str. 207 • 30165 Hannover • Germany http://www.esd.
NOTE The information in this document has been carefully checked and is believed to be entirely reliable. esd makes no warranty of any kind with regard to the material in this document, and assumes no responsibility for any errors that may appear in this document. In particular descriptions and technical data specified in this document may not be constituted to be guaranteed product features in any legal sense.
Document file: I:\Texte\Doku\MANUALS\CAN\CAN-USB-2\Englisch\CAN-USB2_Hardware_en_14.odt Date of print: 2013-03-06 Document type number: DOC0800 PCB version: CAN-USB/2 Rev. 1.2 Document History The changes in the document listed below affect changes in the hardware as well as changes in the description of the facts, only. Revision Chapter 1.
Safety Instructions ● When working with CAN-USB/2 follow the instructions below and read the manual carefully to protect yourself from injury and the CAN-USB/2 from damage. ● Do not open the housing of the CAN-USB/2. ● Never let liquids get inside the CAN-USB/2. Otherwise, electric shocks or short circuits may result. ● Protect the CAN-USB/2 from dust, moisture and steam. ● Protect the CAN-USB/2 from shocks and vibrations. ● The CAN-USB/2 may become warm during normal use.
Table of contents 1. Overview...................................................................................................................................... 7 2. Case View with LED and Connector Description..........................................................................8 2.1 LED-Displays......................................................................................................................... 9 3. Hardware Installation ..........................................................
Overview 1. Overview Electrical Isolation C A N B U S Power Supply 5 V(DC) DSUB9 CiA pinning Physical CAN Layer Digital Isolator CAN ARM 7 USB Controller Microcontroller USBConnector +5 V= DC/DC Converter +5 V= LEDs Figure 1: Block-circuit diagram of CAN-USB/2 module The CAN-USB/2 module is an intelligent CAN interface with an ARM7 micro controller for local CAN data management. The module supports the USB 2.0 Hi-Speed interface with data transfer rates of 480 Mbit/s.
Case View with LED and Connector Description 2. Case View with LED and Connector Description Figure 2: PCB top view Figure 3: USB Interface Page 8 of 25 Hardware Manual • Doc. No.: C.2066.21 / Rev. 1.
Case View with LED and Connector Description 2.1 LED-Displays LED NAME Number USB LED300D Power LED300C CAN OK Description Status on USB module is enumerated (a node-ID is assigned to the USB module) on module is in operation, the 5 V power supply is applied to the module LED300B on data is received or send on the CAN bus LED300A on CAN interface is initialized, bit rates are set off bit rate not set fast flashing (appr.
Hardware Installation 3. Hardware Installation To put the CAN-USB/2 into operation, please follow the installation notes. Procedure see page Read the safety instructions at the beginning of this document carefully, before you start with the hardware installation! 4 1. Connect the CAN-USB/2-module with the USB bus of the PC - 2. Please note that the CAN bus has to be terminated at both ends! esd offers special T-connectors and termination connectors.
Technical Data 4. Technical Data 4.1 General Technical Data Temperature range 0...50°C ambient temperature Humidity 90 %, non-condensing Power supply via USB 2.0 bus, nominal voltage: 5V current consumption: max.
Technical Data 4.3 CAN Interface Number of CAN interfaces 1 CAN protocol ISO 11898-1 (11 and 29 bit CAN identifier are supported) Physical Layer CAN High Speed interface according to ISO 11898-2, transmission rate programmable from 10 Kbit/s to 1 Mbit/s Bus termination terminating resistor has to be set externally, if required Electrical isolation of CAN-interfaces from other units via digital isolators and DC/DC-converters Table 4: Data of the CAN interface 4.
Connector Assignments 5. Connector Assignments 5.1 CAN Interface at DSUB9 Connector Device connector: RJ45 socket, 8-pin Pin Position: Pin Assignment: Signal Pin CAN_GND 6 CAN_H 7 reserved 8 reserved 9 Signal 1 reserved 2 CAN_L 3 CAN_GND 4 reserved 5 Shield Signal Description: CANx_L, CANx_H ... CAN signals of the CAN interface x (x... 1 - 4) CANx_GND... reference potential of the local CAN physical layer of CAN interface x (x... 1 - 4) - ...
Connector Assignments 5.2 USB Socket Note: The module may only be operated at USB nets with USB interface version numbers ≥ 1.1-interface! Using versions earlier than 2.0 reduces the data transfer rate. Pin Position: Pin Assignment: Pin Signal 1 VBUS 2 D- 3 D+ 4 GND Shell Shield USB socket (series B) Page 14 of 25 Hardware Manual • Doc. No.: C.2066.21 / Rev. 1.
Correctly Wiring Electrically Isolated CAN Networks 6. Correctly Wiring Electrically Isolated CAN Networks For the CAN wiring all applicable rules and regulations (EC, DIN), e.g. regarding electromagnetic compatibility, security distances, cable cross-section or material, have to be met. 6.1 Light Industrial Environment (Single Twisted Pair Cable) 6.1.
Correctly Wiring Electrically Isolated CAN Networks 6.1.2 Cabling ● for devices which have only one CAN connector per net use T-connector and stub (shorter than 0.3 m) (available as accessory) Figure. 5: Example for proper wiring with single shielded single twisted pair wires 6.1.
Correctly Wiring Electrically Isolated CAN Networks 6.2 Heavy Industrial Environment (Double Twisted Pair Cable) 6.2.1 General Rules The following general rules for the CAN wiring with single shielded double twisted pair cable must be followed: 1 A cable type with a wave impedance of about 120 Ω ±10% with an adequate wire cross-section (0.22 mm²) has to be used. The voltage drop over the wire has to be considered! 2 For heavy industrial environment use a four-wire CAN cable.
Correctly Wiring Electrically Isolated CAN Networks 6.2.2 Device Cabling ● To connect CAN devices which are equipped with one CAN connector per net, use T-connectors and cable stubs (shorter than 0.3 m). Attention: If single shielded double twisted pair cables are used, realize the T-connections by means of connectors that support connection of two CAN cables at one connector where the cable’s shield is looped through e.g. DSUB9 connector from ERNI (ERBIC CAN BUS MAX, order no.:154039).
Correctly Wiring Electrically Isolated CAN Networks 6.3 Electrical Grounding ● CAN_GND has to be connected between the CAN devices, because esd CAN devices are electrically isolated from each other! ● CAN_GND has to be connected to the earth potential (FE) at exactly one point of the network! ● Each CAN interface without electrically isolated interface acts as an earthing point. For this reason do not connect more than one CAN device without electrically isolated CAN interface! ● Earthing can e.g.
Correctly Wiring Electrically Isolated CAN Networks 6.5 Examples for CAN Cables 6.5.1 Cable for Light Industrial Environment Applications (Two-Wire) Manufacturer U.I. LAPP GmbH Schulze-Delitzsch-Straße 25 70565 Stuttgart Germany www.lappkabel.com ConCab GmbH Äußerer Eichwald 74535 Mainhardt Germany www.concab.de Cable Type e.g. UNITRONIC ®-BUS CAN UL/CSA (1x 2x 0.22) (UL/CSA approved) Part No.: 2170260 UNITRONIC ®-BUS-FD P CAN UL/CSA (1x 2x 0.25) (UL/CSA approved) Part No.: 2170272 e. g.
CAN Troubleshooting Guide 7. CAN Troubleshooting Guide The CAN Troubleshooting Guide is a guide to find and eliminate the most frequent hardware-error causes in the wiring of CAN-networks. 3 2 V CAN_H CAN_H 1 120 V CAN_L CAN_L CAN_GND CAN_GND 1 120 Figure. 8: Simplified diagram of a CAN network 7.1 Termination The termination is used to match impedance of a node to the impedance of the transmission line being used.
CAN Troubleshooting Guide 7.2 Electrical Grounding The CAN_GND of the CAN network has to be connected to the functional earth potential (FE) at only one point. This test will indicate if the CAN_GND is grounded in several places. To test it, please 1. 2. 3. Disconnect the CAN_GND from the earth potential (FE). CAN_H Measure the DC resistance between CAN_GND and earth potential (see figure on the right). CAN_GND Connect CAN_GND to earth potential. CAN_L >1M functional earth (FE) Figure.
CAN Troubleshooting Guide Normally the voltage should be between 2.0 V and 4.0 V. If it is lower than 2.0 V or higher than 4.0 V, it is possible that one or more nodes have faulty transceivers. For a voltage lower than 2.0 V please check CAN_H and CAN_L conductors for continuity. For a voltage higher than 4.0 V, please check for excessive voltage. To find the node with a faulty transceiver please test the CAN transceiver resistance (see below). 7.
Declaration of Conformity 8. Declaration of Conformity Page 24 of 25 Hardware Manual • Doc. No.: C.2066.21 / Rev. 1.
Order Information 9. Order Information Type CAN-USB/2 Properties 1 x CAN 2.0A/B, ISO 11898, USB 2.0 Order No. C.2066.02 * includes CAN layer 2 software driver on CD-ROM for Windows and Linux Software CANopen-LCD Windows/Linux CANopen® license for Linux and Windows incl. CDROM J1939 Stack for esd-CAN-Hardware, includes J1939 Stack for Windows Windows-XP object code, J1939 Simulation Tool, esd CAN Windows driver license C.1101.06 C.1130.
